modifying game folders/ adding mods

I am new to windows vista home premier, last using xp pro.
Well I dont care too much for vista so far....3 days!!!
I cannot install xp pro on my new computer, it is not compatable.

I am having a miserable time trying to figure out how to add mods into my game folders!!

I play oblivion v a lot, and I like to use a lot of game mods. Vista will not give me access to add or modify data in my program folders. This is a security,sharing,parental controll issue.
How can I get my program folders to act like xp folders, and let me do what I want/need?
I am continuously told that as administrator/owner I have no permission to add or modify data in any program folder.
If I cant resolve this issue I have a new computer for sale.
Earl

i dont have an idea about how you can add those mods, but you can use a virtual machine software to have xp and vista running at the same time and then you can edit add the mods in xp!